Muffler



Feb. 19 1924.

' M. J. OCONNOR MUFFLER Filed May 5. 1921 nowof: Micheli J @Connor un @@0@k ,o 0 0 0 0,-..

Patented Feb. 19, 1924.

f State of ew Jersey,

UNITED STATES PATENT OFFICE.

MICHAEL J. OCONNOR, 0F BLOOMING-DALE, NEW JERSEY.

MUFFLER.

Application tiled May 3, 1921. Serial No. 466,593.

To all whom it may' concern.'

'a citizen of the United States, residing at Bloominvdaldin the county of Passaic and have invented certain new and useful Improvements in Muillers, of which the following is a specification.

My said invention relates to a. muiiler for internal combustion engines and itv is an object thereof to provide a muffler consisting of parts that may be readily separated, as for cleaning.

A further object of my invention is to provide a muffler that operates on a new principle disclosed also in my co-pending application No. 319,002, filed August 21, 1919, whereby the successive discharges of exhaust gas may bereleased to the external air in a step-by-step fashion so as to iminish the noise of the exhaust and in such a manner as not to create a back pressure on the motor.

Referring to the accompan ing drawings which are made a art hereo and on which similar reference c aracters indicate similary parts,

Figure 1 shows a central longitudinal section of my improved muier,

Figure 2 a transverse section on line 2-2 of Figure'l, and

Figure 3 a transverse of Figure 1.

In the drawings reference character 10 indicates an outer enclosing casing for the parts of the muffler, this casing having an opening 11 for entrance of air. A sleeve 12 attached to the motor exhaust pipe has a conical enlargement 13 terminating in a flan e 14 adapted to abut against the end of the casing 10 and a tapered annular portion 15 extends rearward from the iange,

section on line 3-3 the iiaringl forward end of casing 1() engag-v ing within said tapered portion. Within the casing 10 is a sleeve 16 preferably concentric therewith. At its forward end this sleeve has a tapering'portion 17 forming arv end of the sleeve extends much farther back at the t0 than at the bottom while the ribs 18 are o corresponding lengthand are cut oil' squarely at theirl rear ends. Sleeve 19 is preferably concentric with the casing 10 an sleevel, a vertical flange 2O at its rear end extending out to the casing 10 and forming the rear wall of a continuation of the passages between the ribs 18. Fixed to the sleeve 19 are also a series of ribs 21 equal in number to the. ribs 18, the space between each pair of ribs forming with the space in front of flange 20 a continuation of a space between' a corresponding rpair of ribs 18. Said passages are completed at the rear of the sleeve v16 by members 20 which are preferably extensions of the ribs 21. Themembers 20 are preferably but not necessarily secured at their rearedges to the ianges 2O by brazing or the like and are adapted to abut the rear ends of the ribs 18 to form continuations thereof so as to connect the passages formed by the ribs 18 and 21. Fitting within the sleeve 19 is a funnel 22 communicating with each vof the passages between ribs 18. This funnel in turn communicates with a longitudinal passage in an internal sleeve 23, the funnel having radially extending flanges at 24; by which one end of the sleeve 23 is supported. Passages 25 extend between the sleeves 19 and 23 and interrnediate the flanges 211 into the central passageway. The rear end of sleeve 23 is supported by a transversely extending` web 26 having a central flange resting against. the interior of casing 10. This web also has an intermediate flange forming a support for a perforated drumk 27 supported at its rear end by a flange on a rear web 28. This web has a tapered forwardly extending `flange at 29 litt-ing within a 'Haring portion of casing 10 and also has a series of openings 30.

The entire device is held in assembled po sition by bolts 31 extending from front to rear and having nuts 32 thereon. Spacers 33 surrounding said bolts are provided between the web 26 and the iianges 20 of sleeve 19.

In the operation of the device the charge of exhaust gas will enter the pipe 12 and'be distributed. among the various passages between ribs 18. As will be evident from the consideration of Figure 1 the passage at the upper part of the figure is much longer than that at the lower part and the difference is increased `due tothe relative arrangement of passages between ribs 21, the longest passage betwecn ribs 18 opening into the longest passage between ribs 21 and vice versa.

amount of air admitted through opening ll enters the central passage by way of passages 25 to cool the gases before they reach the atmosphere. As each portion of gas passes out vof sleeve QS-it is further broken up by the perforations in sleeve 27 and then goes out through openings 30 to t'he atmosphere. The length of the different passages may be so regulated that at some ordinaryv speed, as for example, 2O miles per hour, the sub-divided portions of escaping gas from successive charges may follow each other at regularly spaced intervals.

l have shown a preferred form of the invention but it is obvious that the parts may be held together in various ways, as by brazing, soldering` etc., and also that certain parts now xed could be l'oose and vice versa. Various other changes lmay be made within the scope of my invention therefore I do not limit myself to the specific device shown in the drawings and described in the specification but only as indicated by the appended claims.

Having thus fully described my said invention, what I claim as new and' desire to secure by Letters Patent, is:

l. A mnfller for explosive engines comprising, a casing, a passage leading from the casing` to receive the gases from the exhaust pipe of the engine, a series of separated passages leading rearwardly therefrom, a flange extending inwardly of the casing and having a series of portions each forming a rear wall for each of the said series of separated passages the wall portions off said flange being located at varying distances from the engine, other passages for conducting the exhaust gases from the wall portions toward the engine, and a common passage receiving the gases from the last said passages, substantially as set forth.

2. A muffler for explosive engines comprising a common passage adjacent the engine, branches of varying length extending rearwardly therefrom, a common passage to which said branches lead, means to subdivide the exhaust gases after leaving the last named common passage, and means surrounding the entrance of the last named common passage for admitting air thereto, substantially as set fort-h.

3. A muiller for explosive engines comprising an outer casing, means supported by the casing for receiving the successive exhausts from the engine, mechanism supported in the casing .comprising means for sub-dividing the exhausts from the engine and causing the divided parts to taverse paths of varying length, a sleeve positioned centrally of and spaced from the casing providing a commonv path for the successively arriving portions, a perforated drum mounted concentrically of the casing and having direct communication with the sleeve for further dividing saidT gases, and a web at the rear of the drum supported by the casing and having a plurality of outlets for the exhaust gases, substantially as set forth.

t. A muiiler for explosive engines comprising a casing, a sleeve within the casing and extending lengthwise thereof, longitudinal ribs spacing the sleeve from the casing, asecond sleeve Within the rst and sim- Ailarly located, said second sleeve having an annular imperforate extension bearing against the casing, longitudinal ribs extending between said sleeves and radial ribs on said fiange registering with ribs of said inner and outer sets, said sets of ribs forming recurved passages of varying length, a common passage leading from the motor exhaust pipe to said passages and a common exit passage located centrally of said sleeves and connected to each of said passages, substantially as set forth.

5. A muffler for explosive engines comprising a casing, a sleeve within the casing and extending lengthwise thereof, longitudinal ribs spacing the sleeve from the casin'g, a second sleeve within the first and similarly located, said sleeve having an annular imperforate flange bearing against the casing, longitudinal ribs extending between said sleeves and lying in the same planes as corresponding ribs of the first set. said sets of ribs `forming walls of re-curved passages of varying length', a common passage lead'- ing from the motor exhaust pipe to said passages and a common exit passage located centrally of said sleeves and connected to each of said passages comprising a fu'nnel attached to the second sleeve, an inner sleeve having one end supported by the funnel and a perforated drum at the rear end of the Sleeve and having means t0 support the other` end of the same, substantially as set forth.

6. A muiller for explosive engines comprising a casing, a sleeve within the casing and extending lengthwise thereof, longitudinal ribs spacing the sleeve from the casing, a second sleeve within the first and similarly located, said sleeve having an annular imperforate extension bearing against the casing, longitudinal ribs extendingr between said sleeves, said sets of ribs forming walls of re-curved passages of varying length, a common passage leading from the motor exhaust pipe to said passages and a common exit passage located centrally of said sleeves and connectedto each of said passages -comprising a third sleeve concentric with the other sleeves and the casing ing the exhaust and air assages leading into the last named sleeve a jacent to its forward end, substantially as set forth. y

7. A muiiier for explosive engines coinprising a casing, a sleeve within the casing and extending lengthwise thereof, longitudinal ribs spacing the sleeve from the casing, a second sleeve within the first and similarly located, said sleeve having an annular imperforate extension bearing against the casing, longitudinal ribs extending between said sleeves, said .sets of ribs forming walls of re-curved passages of unequal length, a common passage leading from the motor exhaust pipe to said passages and a common exitv passage mounted centrally of said sleeves and connected to each of said passages comprising a third sleeve concen- 'tric with the casing and located within the other sleeves, means at the forward end of the sleeve for supporting admitting air thereto, a perforated drum at the rear of the sleeve for further dividases and a web between the last named s eeve and the drum and embodying means for supporting an end of each, substantially as set forth.

8. A muflier for explosive engines comprising a casing, a sleeve within the casing and extending lengthwise thereof, longitudinal ribs spacing thesleeve from the casing, a second sleeve within the -first and similarly located, said sleeve having an an passages comprising a nular imperforate extension bearing against the casing, longitudinal ribs extendin between said sleeves, said sets of ribsv orming walls of re-curved passagesof varying length, a common passage leading from the motor exhaust pipe to said passages and a common exit passagel mounted centrally of said sleeves and connected to each of said tric with the casing and located within the othersleeves, means at the forward end of the sleeve for supporting the sleeve and admitting air thereto, a perforated drum4 at the rear of the sleeve for further subdividing1 thel exhaust gases and a web between t e last named sleeve and the drum and einbo'dyin end of each an a web sup orte by the end of the casing, said web aving means to support an end of the perforated drum and havin a plurality of exit passages for further ividing 4the exhaust gases, substantially as set forth.

9. A muilier for explosive engines cointhird sleeve concenmeans for su porting an,

a tube forming the central passage the exhaust from the engine, means tubes mounted concentricallg of the first for-dividingthe exhausts om the engine and feeding them seriatim to the 'tube and means surrounding the central common passageway for mixing cold air with such divided portions of the exhausts as 'they enter the central common passageway, substantially as set forth.

10. A muffler for explosive engines comprising a casing, a iiange extending substantially transversely of the casing and having a series of wall portions located at varying distances from the engine, a series of separated passages extending longitudinally of the casing for conducting 4the gases to the series of wall portions respectively, a second series'of separated passages for oonducting the gases from they wall portions of' the flange, and a common passage for receiving the gases, substantially as set forth. v

11. A muiiier for-explosive engines .comprising a casing, a fiange extending substantially transversely of the casing and having a series of wall4 ortions located at varying distances from t e engine, a series of separated passa es extending longitudinally of the casing or conducting the gases to the series of wall portions respectivel a second series of separated passages for conducting the gases from the wall portions of the flange, a common passage for receivin the gases, and means for conducting co d air to the common passage, substan-y tially as set forth. y A

12. A muffler for explosive engines comprising a casing, a flan e extending substantially transversely of t e casing and having a series of wall ortions located at varying distances from t e engine, a series of sepa`- rated passa es extending longitudinally of the casing or conducting the gases to the series of wallportions respectively, a. sec-4 105 ond series of separated Vpassages for conducting the gases from the wall portions of the flange, a common passage for receivprising way for comprising ingjthe gases, means for conducting cold air and means for furthe gases received by thecommonv passage, substantially as set forth.

In witness whereof, I have. hereunto set my hand and seal at Bloomin dale, New Jersey, this 9th day of April, A. nineteen 115 hundred and twenty-one.

v MICHAEL J. OCONNOR. fr.. 5.]

Witnesses:

EDWARD J. DUNN, CLARENCE KAHMAN.

to the common` passage, ther dividing 

